Answer :
Final answer:
Diamond-shaped signs are used as hazard symbols, representing potential dangers associated with substances such as chemicals.
Explanation:
A diamond-shaped sign is commonly used as a hazard symbol in various contexts, including roadways. However, in the specific context of the given options, a diamond-shaped sign represents a hazard diamond. This symbol is typically seen on containers of chemicals in laboratories or workplaces, providing information about the potential dangers associated with the substance.
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